Capped Orb Mussel vs coast amaranth

Musculium lacustre compared with Amaranthus pumilus

Key Differences

• Capped Orb Mussel is Least Concern while coast amaranth is Extinct.

Taxonomic Classification

Rank	Capped Orb Mussel	coast amaranth
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Magnoliophyta (Flowering Plants)
Class	Bivalvia (Bivalvia)	Magnoliopsida (Dicots)
Order	Sphaeriida (Sphaeriida)	Caryophyllales (Caryophyllales)
Family	Sphaeriidae	Amaranthaceae
Genus	Musculium	Amaranthus
Species	Musculium lacustre	Amaranthus pumilus

Conservation Status

Capped Orb Mussel

LC — Least Concern

coast amaranth

EX — Extinct

Physical Characteristics

Attribute	Capped Orb Mussel	coast amaranth
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Capped Orb Mussel

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Sweden, and United States.

coast amaranth

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found in Japan.

Capped Orb Mussel

The Capped Orb Mussel (Musculium lacustre) is a species in the genus Musculium. It is currently classified as Least Concern (LC) on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

coast amaranth

Coast amaranth (Amaranthus pumilus) is an annual herb in the family Amaranthaceae, native to the Atlantic and Gulf coasts of the eastern United States, where it once grew on coastal foredunes, beach strand, and shell-hash substrates above the high tide line from New York south to South Carolina. It is a low-growing, fleshy plant with small, rounded leaves and inconspicuous green flowers typical of the genus. Coast amaranth is assessed as Extinct in the Wild by the IUCN, as it has not been reliably documented from wild populations since the mid-20th century; the last confirmed collections date to the 1960s. The species' decline and likely extinction resulted from intense human pressure on Atlantic coastal habitats through shoreline development, beach stabilisation, vehicular traffic on beaches, and increased storm frequency disrupting pioneer dune vegetation. It is federally listed as Threatened in the United States, though this listing predates confirmed extinction in the wild. A small number of ex-situ accessions may exist in botanical garden collections. Genetic material and seed banking efforts represent the only remaining conservation options for this critically reduced species.